Title:
ZONE DETECTION LOCATOR
Document Type and Number:
WIPO Patent Application WO2004034727
Kind Code:
A3
Abstract:
A method and apparatus for a zone detection system in which assets and personnel to be monitored are assigned a transmitter that emits a transmitter signal that includes a common code and a unique code. Processing requirements associated with restricted zone monitoring are reduced by scanning received signals for the single common code or a relatively small number of common codes. Processing requirements associated with locating an individual transmitter are reduced by scanning for a single transmitter signal. Transmitter signals are relayed by sub-sector RF-relays to a centralized sector signal processing computer. One or more signal processing computers interface with a system controller that supports a centralized user interface configurable to manage one or more sectors. CDMA matched filter techniques, power signature maps, and two-dimensional/three-dimensional convolution techniques are used to efficiently detect signals and to refine the estimated location a specific transmitter or a group of transmitters.
Inventors:
LAND THOMAS (US)
Application Number:
PCT/US2003/029119
Publication Date:
November 04, 2004
Filing Date:
October 10, 2003
Export Citation:
Assignee:
ITT MFG ENTERPRISES INC (US)
LAND THOMAS (US)
LAND THOMAS (US)
International Classes:
G01S5/02; G06K7/00; G01S19/11; G06K17/00; (IPC1-7): H04Q7/38; G08B13/14; G07C9/00
Domestic Patent References:
| WO1997048081A1 | 1997-12-18 | |||
| WO2000018148A1 | 2000-03-30 | |||
| WO1995030970A1 | 1995-11-16 |
Foreign References:
| US5119104A | 1992-06-02 | |||
| EP0575753A2 | 1993-12-29 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 0130, no. 53 (E - 713) 7 February 1989 (1989-02-07)
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